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  <h1 class="topictitle1">添加HA成员</h1>
  <div>
   <p>添加成员节点后，如果您需要使用高可用特性，请选择某一个成员节点为HA成员。当主节点故障时，业务自动切换至HA成员节点（即备节点）。对于1.6.0及后续版本，<span class="uicontrol">“内部通信网络平面”</span>更名为<span class="uicontrol">“内部通信网络”</span>，本节以1.5.0版本为例进行描述。</p>
   <div class="section">
    <h4 class="sectiontitle">前提条件</h4>
    <ul>
     <li>系统已添加成员节点。</li>
     <li>待添加为HA成员的成员节点需要与主节点部署形态相同。</li>
     <li>待添加为HA成员的成员节点需额外预留1个IP地址作为浮动IP。</li>
    </ul>
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   <div class="section">
    <h4 class="sectiontitle">操作步骤</h4>
    <ol>
     <li><span>选择<span class="menucascade" id="HA00013__ha00012_menucascade31053579148">“<span class="uicontrol" id="HA00013__ha00012_uicontrol41059577142"><span id="HA00013__ha00012_text1054020121612">系统</span></span> &gt; <span class="uicontrol" id="HA00013__ha00012_uicontrol154661958121418"><span id="HA00013__ha00012_text8757278167">基础设施</span></span> &gt; <span class="uicontrol" id="HA00013__ha00012_uicontrol54471544151"><span id="HA00013__ha00012_text1631251418164">集群管理</span></span>”</span>。</span></li>
     <li><span>选择<span class="uicontrol" id="HA00013__ha00012_uicontrol1161813395168">“<span id="HA00013__ha00012_text353374216166">备份集群</span>”</span>。</span></li>
     <li><span>选择<span class="menucascade">“<span class="uicontrol"><span>HA管理</span></span> &gt; <span class="uicontrol"> <span>添加HA成员</span></span>”</span>。</span></li>
     <li><span>在<span class="uicontrol">“<span>可选成员节点</span>”</span>区域勾选待添加为HA成员的成员节点。</span></li>
     <li><span>在网络设置区域，填写HA成员的信息。相关参数说明请参见<a href="#HA00013__table4154132019214">表1</a>。</span><p></p>
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       <table cellpadding="4" cellspacing="0" summary="" id="HA00013__table4154132019214" frame="border" border="1" rules="all">
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         <b>表1 </b>HA成员网络设置参数说明
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          <th align="left" class="cellrowborder" valign="top" width="29.5%" id="mcps1.3.3.2.5.2.1.2.3.1.1"><p>参数</p></th>
          <th align="left" class="cellrowborder" valign="top" width="70.5%" id="mcps1.3.3.2.5.2.1.2.3.1.2"><p>说明</p></th>
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          <td class="cellrowborder" valign="top" width="29.5%" headers="mcps1.3.3.2.5.2.1.2.3.1.1 "><p><span>浮动IP地址</span></p></td>
          <td class="cellrowborder" valign="top" width="70.5%" headers="mcps1.3.3.2.5.2.1.2.3.1.2 "><p>填写内部通信网络平面的浮动IP地址。浮动IP地址需要与主节点内部通信网络平面连通。如果主节点内部通信网络平面复用了备份网络，请勿将备份网络IP地址作为浮动IP地址。</p></td>
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          <td class="cellrowborder" valign="top" width="29.5%" headers="mcps1.3.3.2.5.2.1.2.3.1.1 "><p><span>仲裁网关</span></p></td>
          <td class="cellrowborder" valign="top" width="70.5%" headers="mcps1.3.3.2.5.2.1.2.3.1.2 "><p><span style="color:#282B33;">仲裁网关用于主备切换时检测备节点的链路状态，数量为1-3个。仲裁网关需要和内部通信网络连通，且IP地址不重复。IP地址不能以127开头。</span></p></td>
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      </div> <p></p></li>
     <li><span>单击<span class="uicontrol">“<span>确定</span>”</span>。</span><p></p>
      <div class="note">
       <img src="public_sys-resources/note_3.0-zh-cn.png"><span class="notetitle"> </span>
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        <p>由于主节点宕机，心跳中断，备节点无法探测到主节点浮动IP地址，但可以探测到仲裁网关时，备节点将升主，主备切换时间为5分钟左右。</p>
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      </div> <p></p></li>
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     <strong>父主题：</strong> <a href="HA00010.html">配置集群高可用</a>
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